Update README.md

sync PHP version requirements readme.txt -> readme.md

Author: JamesHeinrich

README.md

@@ -146,9 +146,10 @@ Reads & parses (to varying degrees):
 Requirements
 ===
 
-* PHP 4.2.0 up to 5.2.x for getID3() 1.7.x (and earlier)
-* PHP 5.0.5 (or higher) for getID3() 1.8.x (and up)
-* PHP 5.0.5 (or higher) for getID3() 2.0.x (and up)
+* PHP 4.2.0 up to 5.2.x for getID3() 1.7.x  (and earlier)
+* PHP 5.0.5 (or higher) for getID3() 1.8.x  (and up)
+* PHP 5.3.0 (or higher) for getID3() 1.9.17 (and up)
+* PHP 5.3.0 (or higher) for getID3() 2.0.x  (and up)
 * at least 4MB memory for PHP. 8MB or more is highly recommended.
   12MB is required with all modules loaded.